YotaTech Forums  

Go Back   YotaTech Forums > Toyota SUV & Truck Tech > 95.5-2004 Tacomas & 96-2002 4Runners
Sign in using an external account
Register Forgot Password?
Search


95.5-2004 Tacomas & 96-2002 4Runners 4th gen pickups and 3rd gen 4Runners

Welcome to Yotatech!
Welcome to Yotatech,

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!


Reply
 
LinkBack Thread Tools Search this Thread
Old 09-29-2005, 08:44 PM   #1
Contributing Member
Personal Sales Rating: (0)
 
YotaJunky's Avatar
 
Join Date: Feb 2005
Location: Vancouver BC
Posts: 783
Cat converter heat shield question...

I just installed my carsound cat converter and I was wondering if I installed it correctly. Is the heat shield supposed to be on the bottom side of the cat after it is installed, or vice versa? I installed it with the heat shield on the bottom side just like the old OEM that was removed.

Also, using a direct fit cat, I noticed that the outer edges of the flanges started to bend inwards with a bulge in the middle due to the thickness of the gaskets between the cat flange and the muffler and exhaust flanges. I hope I explained that clearly. I'll try to get some pics for more clarity.

Any suggestions?

Troy
This ad is not displayed to registered members.
Register your free account today and become a member on Yotatech!
__________________
'95 4WD 22R-E 4Runner, 5spd, 242k kms, 4.56 gears, extended diff breather mod, bilstein shocks, Aisin manual hub swap, 1.25 rear coil spacer, 32" BFG's -- my DD
YotaJunky is offline   Reply With Quote
Old 09-30-2005, 07:36 PM   #2
Contributing Member
Personal Sales Rating: (0)
 
habanero's Avatar
 
Join Date: Sep 2005
Location: mo
Posts: 5,771
Send a message via AIM to habanero
Heatshield down.
__________________
My rides:
'96 4Runner SR5 4x4, manual, e-locker, manual hubs too. Stuff happened to it. Stuff is still happening to it.

'99 4Runner SR5 Highlander, manual w/locker. Stuff is starting to happen to this one too...but not too much stuff.

http://www.yotatech.com/f200/habaner...thread-201751/
Quote:
Originally Posted by Tacoclimber View Post
Habanero - you ride a Gary Fisher, you change your own oil, AND you have a man-eating pumpkin pie as your avatar. You are anything BUT a soccer mom. :D
habanero is offline   Reply With Quote
Old 09-30-2005, 11:58 PM   #3
Registered User
Personal Sales Rating: (0)
 
CoedNaked's Avatar
 
Join Date: Apr 2004
Location: Vancouver, British Columbia, Canada
Posts: 1,475
Hey Troy,
How was your stock cat after you removed it? Are you plumbing in a complete 2 1/4" exhaust system hence the new cat? Or just putting in a new cat?
__________________

SOLD (Aug '09): 1993 Xtra Cab Pickup | 4x4 | 3.0 - V6 | R150F | Grey | 331,000 km's (206,875 miles)

CURRENT TRUCK: 2007 Tacoma Double Cab Long Box | 4x4 | 4.0 VVT-i - V.6 | 5 speed auto | "Indigo Ink Pearl" | TRD Sport & Towing (6500 lb) Pkg | Amsoil 5w30 Synthetic Oil | Amsoil Synthetic Drivetrain Fluids | BFGoodrich All Terrains 265/70/17 Load Range C | 109,000 kms (68,000 miles)
CoedNaked is offline   Reply With Quote
Old 10-01-2005, 06:32 AM   #4
Contributing Member
Personal Sales Rating: (0)
Threadstarter [OP]
 
YotaJunky's Avatar
 
Join Date: Feb 2005
Location: Vancouver BC
Posts: 783
Quote:
Originally Posted by CoedNaked
Hey Troy,
How was your stock cat after you removed it? Are you plumbing in a complete 2 1/4" exhaust system hence the new cat? Or just putting in a new cat?

I'm not sure what the condition of the stock cat was like, because I didn't cut it open. There didn't appear to be any clogging while looking at it from both open ends of the stock cat.

No new pipes, just another cat.

Troy
__________________
'95 4WD 22R-E 4Runner, 5spd, 242k kms, 4.56 gears, extended diff breather mod, bilstein shocks, Aisin manual hub swap, 1.25 rear coil spacer, 32" BFG's -- my DD
YotaJunky is offline   Reply With Quote
Old 10-01-2005, 06:35 AM   #5
Contributing Member
Personal Sales Rating: (0)
Threadstarter [OP]
 
YotaJunky's Avatar
 
Join Date: Feb 2005
Location: Vancouver BC
Posts: 783
Quote:
Originally Posted by habanero
Heatshield down.
I originally had the heatshield down and then a friend who is a mechanic, told me to install it with the heatshield up in order to protect the undercarriage, especially if it was sprayed with undercoating. I'm sure the direction of flow is correct because my direct fit cat can only be bolted in one direction.

Is the heatshield supposed to protect the undercarriage or reduce the risk of causing fires below the truck? I'm confused...

Troy
__________________
'95 4WD 22R-E 4Runner, 5spd, 242k kms, 4.56 gears, extended diff breather mod, bilstein shocks, Aisin manual hub swap, 1.25 rear coil spacer, 32" BFG's -- my DD

Last edited by YotaJunky; 10-01-2005 at 06:37 AM.
YotaJunky is offline   Reply With Quote
Old 10-01-2005, 07:02 AM   #6
Banned
Vendor Sales Rating: (-1)
 
waskillywabbit's Avatar
 
Join Date: Jul 2003
Posts: 0
The heatshield is to dissipate heat from heating up the underbody of the rig. Putting it on the bottom would be pointless as the heat will be dissipated to the open air. The heatshield should be on top of the cat when installed.

Mine was installed professionally, so I think they'd know.

Last edited by rworegon; 08-03-2014 at 11:15 AM.
waskillywabbit is offline   Reply With Quote
Old 10-01-2005, 08:22 AM   #7
Contributing Member
Personal Sales Rating: (0)
Threadstarter [OP]
 
YotaJunky's Avatar
 
Join Date: Feb 2005
Location: Vancouver BC
Posts: 783
Quote:
Originally Posted by waskillywabbit
The heatshield is to dissipate heat from heating up the underbody of the rig. Putting it on the bottom would be pointless as the heat will be dissipated to the open air. The heatshield should be on top of the cat when installed.

Mine was installed professionally, so I think they'd know.


Well, that settles it then. I'll leave it with the heatshield up.

Troy
__________________
'95 4WD 22R-E 4Runner, 5spd, 242k kms, 4.56 gears, extended diff breather mod, bilstein shocks, Aisin manual hub swap, 1.25 rear coil spacer, 32" BFG's -- my DD

Last edited by YotaJunky; 10-02-2005 at 06:27 AM.
YotaJunky is offline   Reply With Quote
Old 10-01-2005, 01:05 PM   #8
Banned
Vendor Sales Rating: (-1)
 
waskillywabbit's Avatar
 
Join Date: Jul 2003
Posts: 0
Quote:
Originally Posted by troy65
Well, that settles it then. I'll leave it with the heatshield up.

Troy

Troy


waskillywabbit is offline   Reply With Quote
Old 10-01-2005, 01:17 PM   #9
Banned
Vendor Sales Rating: (0)
 
jimbo74's Avatar
 
Join Date: Jan 2004
Location: Nor*Cal
Posts: 6,590
Send a message via AIM to jimbo74
Quote:
Originally Posted by waskillywabbit
Mine was installed professionally, so I think they'd know.
in todays world, that jsut couldnt be farther from the truth... sure it might be right, BUT in todays world, a lot of these so called professionals are nothing more than idiots with a job....

when i was a tire guy, i had the ASE certified mechanic ask me how to change drum brakes!!!
jimbo74 is offline   Reply With Quote
Old 10-01-2005, 01:48 PM   #10
Banned
Vendor Sales Rating: (-1)
 
waskillywabbit's Avatar
 
Join Date: Jul 2003
Posts: 0
Like I said, mine was installed PROFESSIONALLY by an individual I know is a professional at muffler installs. Why the heck would I take it to an idiot?

The heat shield is just that a heat shield...for the body, not the ground!

waskillywabbit is offline   Reply With Quote
Old 10-01-2005, 02:38 PM   #11
Banned
Vendor Sales Rating: (0)
 
jimbo74's Avatar
 
Join Date: Jan 2004
Location: Nor*Cal
Posts: 6,590
Send a message via AIM to jimbo74
what i was saying more often then not that the people everyone thinks is a professional is an idiot.....

the ase mechanic i worked with was a professional mechanic and made 2x what i made, but he didn't know how to change drum brakes....
jimbo74 is offline   Reply With Quote
Old 10-01-2005, 02:44 PM   #12
Contributing Member
Personal Sales Rating: (0)
Threadstarter [OP]
 
YotaJunky's Avatar
 
Join Date: Feb 2005
Location: Vancouver BC
Posts: 783
Quote:
Originally Posted by Grounded
Troy,

Seeing as how you're in the "zone" for replacing catalytic converters right now, here's an article on Mazda converters for Judy's car

There's also a 24/7 Live Help Assistance icon at the top of the page.

http://www.car-stuff.com/mazdacatalyticconverter.htm

Pat

Thanks Pat. Maybe I can get her to do her own cat converter!!

Troy
__________________
'95 4WD 22R-E 4Runner, 5spd, 242k kms, 4.56 gears, extended diff breather mod, bilstein shocks, Aisin manual hub swap, 1.25 rear coil spacer, 32" BFG's -- my DD
YotaJunky is offline   Reply With Quote
Old 10-01-2005, 02:45 PM   #13
Banned
Vendor Sales Rating: (-1)
 
waskillywabbit's Avatar
 
Join Date: Jul 2003
Posts: 0
Quote:
Originally Posted by jimabena74
what i was saying more often then not that the people everyone thinks is a professional is an idiot.....

the ase mechanic i worked with was a professional mechanic and made 2x what i made, but he didn't know how to change drum brakes....
I think there are just more idiots in CALIFORNIA...period!

waskillywabbit is offline   Reply With Quote
Old 10-01-2005, 03:21 PM   #14
Banned
Vendor Sales Rating: (0)
 
jimbo74's Avatar
 
Join Date: Jan 2004
Location: Nor*Cal
Posts: 6,590
Send a message via AIM to jimbo74
Quote:
Originally Posted by waskillywabbit
I think there are just more idiots in CALIFORNIA...period!



nah, there are professional idiots everywhere
jimbo74 is offline   Reply With Quote
Old 10-01-2005, 03:22 PM   #15
Contributing Member
Personal Sales Rating: (0)
 
habanero's Avatar
 
Join Date: Sep 2005
Location: mo
Posts: 5,771
Send a message via AIM to habanero
(yanking hard on foot in mouth) I was always told down-the fire thing. I do see the point of it being up. Will keep in mind next time I need new exhaust though so far all my systems have been 360.
__________________
My rides:
'96 4Runner SR5 4x4, manual, e-locker, manual hubs too. Stuff happened to it. Stuff is still happening to it.

'99 4Runner SR5 Highlander, manual w/locker. Stuff is starting to happen to this one too...but not too much stuff.

http://www.yotatech.com/f200/habaner...thread-201751/
Quote:
Originally Posted by Tacoclimber View Post
Habanero - you ride a Gary Fisher, you change your own oil, AND you have a man-eating pumpkin pie as your avatar. You are anything BUT a soccer mom. :D
habanero is offline   Reply With Quote
Old 10-02-2005, 05:25 AM   #16
Contributing Member
Personal Sales Rating: (0)
 
sandcrawler's Avatar
 
Join Date: Jul 2003
Location: maine
Posts: 405
isn't it heat shield _down_ on the stock setup?
__________________
10 TE - salsa, KDSS+Nav
06 SE - galactic gray V8: sold
93 SR5 - lots of rust, salt, and mods: R.I.P.
71 FJ40 - never should've let it go...
sandcrawler is offline   Reply With Quote
Old 10-02-2005, 06:26 AM   #17
Contributing Member
Personal Sales Rating: (0)
Threadstarter [OP]
 
YotaJunky's Avatar
 
Join Date: Feb 2005
Location: Vancouver BC
Posts: 783
Quote:
Originally Posted by sandcrawler
isn't it heat shield _down_ on the stock setup?
I believe it was. That's why it confused me. Anyway, I like the reasoning for the heat shield being up (protecting the underbelly of the vehicle) and I've kept it that way unless there is a compelling reason to flip it.

Troy
__________________
'95 4WD 22R-E 4Runner, 5spd, 242k kms, 4.56 gears, extended diff breather mod, bilstein shocks, Aisin manual hub swap, 1.25 rear coil spacer, 32" BFG's -- my DD
YotaJunky is offline   Reply With Quote
Old 10-02-2005, 05:49 PM   #18
Contributing Member
Personal Sales Rating: (0)
Threadstarter [OP]
 
YotaJunky's Avatar
 
Join Date: Feb 2005
Location: Vancouver BC
Posts: 783
Quote:
Originally Posted by Grounded
Both reasons sound really convincing!
I'm ready for a little myself. Carsound has a 1-800 number if you want to have peace of mind Troy.

http://www.car-sound.com/04converter.asp

I emailed them last week and haven't heard from them yet. Thanks for the suggestion Pat.

Troy
__________________
'95 4WD 22R-E 4Runner, 5spd, 242k kms, 4.56 gears, extended diff breather mod, bilstein shocks, Aisin manual hub swap, 1.25 rear coil spacer, 32" BFG's -- my DD
YotaJunky is offline   Reply With Quote
Old 10-02-2005, 06:21 PM   #19
Registered User
Personal Sales Rating: (0)
 
Flamedx4's Avatar
 
Join Date: May 2004
Location: 100 miles offshore as much as possible, & Springfield Oregon USA
Posts: 3,291
The heat shield on the coverter goes down. This is because the thing gets to 1800*F and will light things under the truck (like tall grass) on fire! You will notice there is a heat shield above the cat under the floor of the rig. THAT protects the floor.

Score one for Professional idiots....
__________________
All my Yotas are gone. Stuff to sell: http://www.yotatech.com/showthread.p...39#post1009839 -Phil
Flamedx4 is offline   Reply With Quote
Old 10-02-2005, 06:55 PM   #20
Banned
Vendor Sales Rating: (-1)
 
waskillywabbit's Avatar
 
Join Date: Jul 2003
Posts: 0
Okay...I'm no expert on the subject but I just went outside and crawled under my rig and looked at the FSM for my 85.

I noticed several things.

The FSM shows a heat shield above the cat...no heat shield below or on the cat. There is nothing above my cat attached to the floor to protect it, thus I assume that is why it is up like it is. If grass is high enough to hit my cat it is going to be rubbing all that good hot stuff, header, exhaust, muffler etc...at least on my rig.

Don't know the "factual" way that the cat converter god's specify that it be done...but I see the need to protect the floor before protecting the grass.

I think my professional idiot got it right...but perhaps a heat shield in BOTH places is the answer?

waskillywabbit is offline   Reply With Quote
Old 10-02-2005, 06:55 PM
Yotatech
4WD Truck




Paid Advertisement
Reply

Tags
carsound, cat, catalytic, converter, direction, flow, heat, installation, mazda, open, range, shield, side, tacoma, underbelly

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
1980 Exhaust manifold heat shield question freakycody Pre 84 Trucks 8 05-25-2013 06:09 PM
Exhaust-Cat Converter Question 4Runner4Christ 95.5-2004 Tacomas & 96-2002 4Runners 12 10-15-2004 08:31 PM
Cat. Converter Options (Easy Question) 4x4Lamm 95.5-2004 Tacomas & 96-2002 4Runners 1 08-30-2004 02:21 PM
ok to run without manifold heat shield? kyle_22r 95.5-2004 Tacomas & 96-2002 4Runners 9 07-18-2003 01:15 PM
Cat Heat Shield vtruong1 95.5-2004 Tacomas & 96-2002 4Runners 5 03-04-2003 07:00 PM


All times are GMT -8. The time now is 11:37 PM.


2010 InternetBrands, Inc.